Furnace.



D. G. ARTMAN.

FURNACE. APPLICATION rum) 00124, 1909.

Patented June 1, 1909.

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D. G. ARTMAN.

FURNACE.

APPLICATION FILED 001224, 1908.

Patented June 1, 1909.

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DAVID CYRUS ARTMAN, OF TARENTUM, PENNSYLVANIA.

FURNACE Specification of Letters Patent.

Patented June 1, 1909.

Application filed October 24, 1908. Serial No. 459,303.

T 0 all whom it may concern:

Be it known that I, DAVID GYRUs ARTMAN, a citizen of the United States of America, residing at Tarentum, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Furnaces, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to furnaces, and the primary object of my invention is the provision of novel means in connection with the furnace structure for obtaining a maximum of heat units from a minimum expenditure of fuel.

Another object of my invention is to provide a furnace that can be advantageously used in mills for heating sheets of metal, or similar metallic products, the sheets being subjected to a high degree of heat occasioned by the novel arrangement of the flues.

Another object of this invention is to provide a furnace with an endless and movable grate bar, together with novel means for intermittently moving the bar.

A further object of this invention is to provide a furnace structure with a circuitous conduit for the heat units, products of combustion, and fumes and smoke, before their final escape, whereby a maximum degree of heat can be obtained in a portion of the furnace structure, and the heat used for various purposes, as a generator of steam in coils or tubes arranged in the furnac With the above and other objects in view which will more readily appear as the invention is better understood, the same consists in the novel construction, combination and arrangement of parts to be presently described and then claimed.

In the drawings, Figure 1 is a side elevation of a furnace constructed in accordance with my invention, Fig. 2 is a longitudinal sectional view of the same, Fig. 3 is a horizontal sectional view of a furnace taken on the line xa; of Fig. 2, the bottom of the furnace being partly broken away, Fig. 4.- is a transverse sectional view of a furnace taken on the line yy of Fig. 2, and Fig. 5 is a similar view taken on the line ww of Fig. 2.

In the accompanying drawings 1 have illustrated an oblong structure comprising side walls 1 and 2, a front wall 3 and a rear wall l, said structure having an inclined bottom 5 provided at the forward end thereof with a bridge wall 6, said bridge wall being formed integral with the side walls 1 and 2 and extending approximately to the arched roof 7 of the furnace structure.

At the forward end. of the furnace structure, the front wall 3, side walls 1 and 2 and bridge wall 6 extend downwardly to provide an ash pit 8; the front wall 3 being provided with a suitable door way 9 and door 10 where by easy access can be had to the pit 8. The front Wall 3 is cut away to provide a coal opening 11, which is partially closed by a gate 12 slidably mounted between vertical guides 13 arranged in a coal chute 14, this chute being formed by an extension of the side walls 1 and 2 or made of metal and secured to the front wall 3.

Arranged between the front wall 3 and the bridge wall 6 and extending into the opening 11 is a horizontal endless and movable grate 15, said grate being of a conventional form comprising a plurality of pivoted links or bars. Thisgrate in its entirety is supported upon sprocket wheels 16 mounted upon shafts 17 and 18 journaled transversely of the furnace structure. The shaft 17 protrudes from the furnace structure and is provided with a ratchet wheel 19. Engaging said ratchet wheel is a pawl 20 slidably mounted in a keeper 21 secured to the side wall 2 of the furnace. This side wall of the furnace is provided with a bracket 22 for supporting an electric motor 23, the armature shaft 24 of said motor having an eccentric 25 which is connected by a pitman 26 to the upper end of a pawl 20. When the motor 23 isplaced in operation, the pawl 20 is vertically recipr0- cated to intermittently move the ratchet wheel 19 and the grate 15, whereby coal admitted to the grate from the chute 14 will be gradually carried toward the bridge wall 6, and during this movement consume the residue ordinarily precipitated into the ash pit 8.

The bottom 5 of the furnace structure is provided with longitudinal ribs 27 and 28 the rib 27 being of a greater length than the ribs 28 and dividing the bottom of the furnace longitudinally, with one rib 28 between the rib 27 and the side wall 1, and the other rib 28 between rib 27 and the side wall 2. The rib 27 and 28 support a metallic plate 29 having longitudinal grooves 30 for fire brick or similar non-fusible material. The ribs 27 and 28 in connection with the floor plate 29 form a plurality of heating spaces below the plate and which are indicated by the reference numeral 33. The elongated rib 27 separates the heating space at one side of the bottom from those at the other side of the bottom.

The side walls 1 and 2 at the rear end of the furnace and adjacent to the floor plate 29 are provided with flues 32 communicating with the heating spaces 33- beneath the plate 29. The side walls I and 2 adjacent to the bridge wall 6 are providedwith vertical 'l'lues 34, the lower ends of said flues co nn'iunicating with the space 33 while the upper ends'of s aid flues terminate in an arched flue 35 formed in a transverse housing 36, carried by the'roof 7 ofthe furnace. The housing 36 intermediate the ends thereof is provided with an exhaust pipe 37.

To permit of easy access being had to the interior of the furnace structure, the rear wall 4 is provided with two openings 38 normally closed by doors 39 slidably mounted in guides 40 carried by tlie rearwvall 4 of the furnace. Suitable means can be employed for facilitating the raising of doors 39, as shown inFigs. 1 and 2.

The heat units from the combustion chamber 41 of the furnace structure pass over the bridge wall 6 and rearwardly to the iilues 32 escaping through said lines into the space 33,

hus to the fines 34 and finally escaping thro, the flue 35 to the stack 37 i'sia'pparent that the interior of the furnace structure is thoroughly heated before the heat units or products of combustion are allowed to escape.

In connection with the furnace a perforated air blast pipe d1 can be used, this pipe extending transversely of the combustion chamber and through the endless grate arranged therein. This air blast pipe is employed to increase the combustion of coal upon the grate.

The entire furnace structure is made of a non-fusible material, and while in the draw ings forming a art of tliis'application, there is illustrated tie preferred embodiments of my invention, 1 would have it understood that thedetails of constr uction can be varied or changed, as to the shape, proportion and manner of assemblage without departing from the spirit of theinvention.

Having now described. invention what I claim as new, is, i l l i i i 1 A sheet metal heating furnace comprising a combustion chamber and a heating chamber, ,bridge wall separating said chamber viir'o m said combustion chamber, said bridge wall of less height ,than tlielheight ol' the heating chamber and constituting \the of the r00 front wall of the heating chamber and the rear wall of the combustion chamber, said heating chamber coinprisin'gside' walls, a rear wall, an inclined bottom and a roof, spaced ribs on the upper i ace of said inclined bottom, a floor plate mounted on said ribs and in connection with the latter forming heating spaces, fire-brick arranged in said floor-plate, said side wall at the-rear thereof I having fines commun cating with the heating spaces below said floor plate, said side walls further having flues formed therein adjacent to the bridge walliaiid communicatingwith the heating spaces 'betweepisnd floor plate and witl i an exhaust 'flu e formed transversely i, said end wall. having openings formed tl iei eiii, and doors for normally ass ing said opening. h l i i 2. A Eastman heating furnace comprising a combustion c iniber heating chamber, said heating chamber having an inclined bottom provided on its upper face withla plurality of ribs, one of saidrib's longer than the other, said elongated rib being )os itione d between the shorter a floor lateinouiited upoii said ribs, said ribs forming in connection with floor plate a plurality of heating spaces, the s de walls of sa d heat- 111g eha nber provided with ilues commun cating with the 'heating'spaces belofliv'ithe floor plate, an exhaiist fiue, and fines coinmunicating with the below the ilo or plate and with said exhaust iliie said ldngitudinal ribs 's ep arating the heating spa'ces "at one side the bottom from "the heating spaces at the opposite side of the :bottomf" 3. A sheet metal heating furiiace coinprising a combustion chamber anda heating ch mber, me ns for s'tippiyingrud tdsaid combustion chamber, a bridge wall separating ,the combustion chamber from the heatchainber, "said heating chamber having 1 Spaced b emu at i said ribs forming aplurality of heating spaces, a floor plate ino irited upon said ribs, fiues for establishingiconirnunication b'etwleen the h lating chamber and the heating spaces below :the floor plate an leid au st ilue, fl ues for establishing communication between the heating spaces below the .Itloor plate, and the exhaust flue, said heating theater having onewal l provided with openings whereby access ,can befhadto fch'amber, and means folc os ing said openings. i

(4. A sheet metal. eatmg furnace compria ing a cojnibu'stion chamber and heating chamber, said heatingtcha iriber aving an inclined bottom provided 'on its upper face w ith a plurality of ribs, certain of said ribs beinglonger than theo ther said elongated rib positioned betweenthe shorter agrooved floorplate noiinted on saidribsand inconnecori'nin'g fa plurality o f'heating an inclined bottom provided'with plurality connect on with spaces, fire brick seated in the grooves of said bottom from the heating spaces at the oppoplate, the side Walls of said heating chamber site side of the bottom. 10 provided with flues communicating with the In testimony whereof I afiix my signature heating spaces below the floor plate, an eX- in the presence of two Witnesses.

5 haust flue, and flues communicating with the DAVID CYRUS ARTMAN.

heating spaces below the floor plate and with Witnesses:

said exhaust flue said longitudinal ribs sepa- MAX H. SROLOVITZ,

rating the heating spaces at one side of the 1 STEWART A. SHANNON. 

